Earth as a binary or a gas giant satellite

[Reynard]

What would the sky look like if Earth was a binary with another of our planets or a satellite of one of our gas giants? Someone created a visual based on each example at the distance of the moon's orbit.

https://www.facebook.com/officialchaosmos/videos/1772671669676240/?hc_ref=NEWSFEED

Many decades back I discovered how to calculate angular diameters for a science fiction project I created. This is a much better example compared to my drawings

 

[Tom Kalbfus]

What would the sky look like if Earth was a binary with another of our planets or a satellite of one of our gas giants? Someone created a visual based on each example at the distance of the moon's orbit.

https://www.facebook.com/officialchaosmos/videos/1772671669676240/?hc_ref=NEWSFEED

Many decades back I discovered how to calculate angular diameters for a science fiction project I created. This is a much better example compared to my drawings

The Moon is about one quarter the diameter as the Earth, if the Earth was a binary with an Earth sized companion, then it would appear the same size as the Moon in our skies if it were four times as far away, so therefore about 1 million miles away. The distance of the Moon is 384,400 km, therefore if Earth's binary companion was 1,537,600 km away, its orbital period would be 155.273 days long or 5.25814 lunar months. On the other hand if you want the orbital period to be one lunar month, the distance would have to be 510,000 km.

 

[Solomani666]

Regina!

 

[-Daniel-]

I have often wondered whay the sky would look like if we had a larger moon or more than one moon. I do like when I see artwork that shows such sky shots.